原文:
C# 實現設置系統環境變量設置
以前實現系統環境變量設置時是要在電腦屬性--高級--環境變量設置,實現方式主要有2種,
- 修改注冊表,添加環境變量
- 調用系統Kernel32.DLL函數,設置環境變量
?
?
注冊表方式,是要修改注冊表的位置是[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment]
代碼我已經封裝,注意要引入命名空間
using Microsoft.Win32; using System.Runtime.InteropServices;
如下:
class SysEnvironment
{
/// <summary>
/// 獲取系統環境變量
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public static string GetSysEnvironmentByName( string name)
{
string result = string .Empty;
try
{
result = OpenSysEnvironment().GetValue(name).ToString(); //讀取
}
catch (Exception)
{
return string .Empty;
}
return result;
}
/// <summary>
/// 打開系統環境變量注冊表
/// </summary>
/// <returns>RegistryKey</returns>
private static RegistryKey OpenSysEnvironment()
{
RegistryKey regLocalMachine = Registry.LocalMachine;
RegistryKey regSYSTEM = regLocalMachine.OpenSubKey( "SYSTEM" , true ); //打開HKEY_LOCAL_MACHINE下的SYSTEM
RegistryKey regControlSet001 = regSYSTEM.OpenSubKey( "ControlSet001" , true ); //打開ControlSet001
RegistryKey regControl = regControlSet001.OpenSubKey( "Control" , true ); //打開Control
RegistryKey regManager = regControl.OpenSubKey( "Session Manager" , true ); //打開Control
RegistryKey regEnvironment = regManager.OpenSubKey( "Environment" , true );
return regEnvironment;
}
/// <summary>
/// 設置系統環境變量
/// </summary>
/// <param name="name">變量名</param>
/// <param name="strValue">值</param>
public static void SetSysEnvironment( string name, string strValue)
{
OpenSysEnvironment().SetValue(name, strValue);
}
/// <summary>
/// 檢測系統環境變量是否存在
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public bool CheckSysEnvironmentExist( string name)
{
if (! string .IsNullOrEmpty(GetSysEnvironmentByName(name)))
return true ;
else
return false ;
}
/// <summary>
/// 添加到PATH環境變量(會檢測路徑是否存在,存在就不重復)
/// </summary>
/// <param name="strPath"></param>
public static void SetPathAfter( string strHome)
{
string pathlist ;
pathlist = GetSysEnvironmentByName( "PATH" );
//檢測是否以;結尾
if (pathlist.Substring(pathlist.Length - 1, 1) != ";" )
{
SetSysEnvironment( "PATH" , pathlist + ";" );
pathlist = GetSysEnvironmentByName( "PATH" );
}
string [] list = pathlist.Split( ';' );
bool isPathExist = false ;
foreach ( string item in list)
{
if (item == strHome)
isPathExist = true ;
}
if (!isPathExist)
{
SetSysEnvironment( "PATH" , pathlist +strHome+ ";" );
}
}
public static void SetPathBefore( string strHome)
{
string pathlist;
pathlist = GetSysEnvironmentByName( "PATH" );
string [] list = pathlist.Split( ';' );
bool isPathExist = false ;
foreach ( string item in list)
{
if (item == strHome)
isPathExist = true ;
}
if (!isPathExist)
{
SetSysEnvironment( "PATH" , strHome + ";" + pathlist);
}
}
public static void SetPath( string strHome)
{
string pathlist;
pathlist = GetSysEnvironmentByName( "PATH" );
string [] list = pathlist.Split( ';' );
bool isPathExist = false ;
foreach ( string item in list)
{
if (item == strHome)
isPathExist = true ;
}
if (!isPathExist)
{
SetSysEnvironment( "PATH" , pathlist + strHome + ";" );
}
}
}
?
?
Kernel32.DLL內有SetEnvironmentVariable函數用于設置系統環境變量
C#調用要用DllImport,代碼封裝如下:
class SetSysEnvironmentVariable
{
[DllImport( "Kernel32.DLL " , SetLastError = true )]
public static extern bool SetEnvironmentVariable( string lpName, string lpValue);
public static void SetPath( string pathValue)
{
string pathlist;
pathlist = SysEnvironment.GetSysEnvironmentByName( "PATH" );
string [] list = pathlist.Split( ';' );
bool isPathExist = false ;
foreach ( string item in list)
{
if (item == pathValue)
isPathExist = true ;
}
if (!isPathExist)
{
SetEnvironmentVariable( "PATH" , pathlist + pathValue+ ";" );
}
}
}
?
更多文章、技術交流、商務合作、聯系博主
微信掃碼或搜索:z360901061

微信掃一掃加我為好友
QQ號聯系: 360901061
您的支持是博主寫作最大的動力,如果您喜歡我的文章,感覺我的文章對您有幫助,請用微信掃描下面二維碼支持博主2元、5元、10元、20元等您想捐的金額吧,狠狠點擊下面給點支持吧,站長非常感激您!手機微信長按不能支付解決辦法:請將微信支付二維碼保存到相冊,切換到微信,然后點擊微信右上角掃一掃功能,選擇支付二維碼完成支付。
【本文對您有幫助就好】元
